Non-precious metal photocatalytic hydrogen production materials have been successfully developed and produced by artificial photosynthetic hydrogen production
Professor Du Pingwu from the School of Chemistry and Materials Science, University of Science and Technology of China, designed and prepared a non-noble metal photocatalytic hydrogen production material with high conversion rate, showing superior performance and stability of artificial photosynthetic hydrogen production. The research results were published on September 1st in the famous international academic journal Energy and Environmental Science of the Royal Society of Chemistry. The consumption of traditional petroleum and fossil energy causes problems such as global warming, environmental pollution and energy shortage, and has become a major challenge for human sustainable development. By simulating photosynthesis, designing high-efficiency photocatalytic systems to absorb photodecomposition water to produce hydrogen will The conversion of solar energy into hydrogen energy is an ideal hydrogen production route. However, due to the large use of precious metal catalysts, it is expensive. At the same time, the spatial distribution between the light absorbing material and the cocatalyst is not uniform, which may reduce the generation of photoinduced excited state electrons, reduce the lifetime of the excited state electrons, and greatly affect the efficiency of photocatalytic hydrogen production. The research team found that the transition metal phosphide as a cocatalyst has a good photocatalytic hydrogen production property, and the phosphide such as cuprous phosphide and molybdenum phosphide is supported on the semiconductor, which can effectively enhance the photocatalytic hydrogen production of the semiconductor. s efficiency. On this basis, the research team used the solvothermal method to subtly load the new nickel phosphide promoter on the cadmium sulfide semiconductor nanowires, and obtained a nickel phosphide/cadmium sulfide composite structure with uniform distribution and close contact. Efficient, stable and inexpensive artificial photosynthetic catalyst. The experimental data and spectral characterization show that the composite structure can effectively promote the rapid electron transfer process in the composite material, inhibit the deactivation of excited state electrons, and improve the performance of visible light catalytic hydrogen production. In the case of adding sodium sulfide/sodium sulfite, the catalyst material realizes efficient photocatalytic hydrogen production: under the condition of visible light greater than 420 nm, the hydrogen production rate per milligram of sample reaches 1200 micromoles per hour, and the number of reaction conversions in 90 hours reaches about 3.27 million. The number of reactions per hour based on the nickel phosphide promoter reached 36,400. Concerned about surprises Blasting Glass Beads,Glass beads are used for blasting and polishing purposes, for cleaning the moulds for forging, casting , glass, rubber, etc., for removing of the tensile stress and increasing and improvement of the corrosion resistance and fatigue life of the component such as aircraft engine turbine blades, haft, landing gear, springs etc., for decorative finishing of the component surfaces, etc.It is used for cleaning the turbine, blade and axle of the airplane engine.
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